Well, I find it difficult to define "mainstream" gay culture, but for the most part I feel like I don't fit into it very well. I'm out but sort of withdrawn about my orientation (just because I think of relationships as private if the person's not there with me!) and I'm pretty femme so I don't think I fit into the stereotypical image of a lesbian that people have - you know, sort of butch, short hair, all that.
If that's how someone wants to express themselves I don't see a problem with it, but it's not how I am. It's kind of annoying sometimes since I sort of fly under the gaydar though :|